Why is Harry potter and the Philosopher's stone called Harry Potter and the Sorcerer's Stone in America? I think Americans know and use the word philosopher so why did they change the name for the american version of the book?

It was a marketing reason, after short discussions, Scholastic came to the conclusion that children may not want to read a book with the word "Philosopher" in it (they thought it may be too dull) and instead choose "Sorcerer" as a more enticing title. This sadly breaks the connection to the myth of the philosopher stone.

just because americans h8 something/
a word doesn't mean that the title
had to be changed

a sorcerer is a wizard/mage and a philosopher is normally someone who theorizes and makes their own philosophies (deep thoughts and judgments on life and why things are etc) however in this case it is an alchemist

wizardry involves magic = conjure or charm something

alchemy involves science = mix elements to create something.

the philosopher's stone is indicated as such to be made from non magical means hence it is difficult (possibly impossible) to recreate

a socerer's stone indicates that it can be instantly created with the wave of a wand and hence would be easy to produce.

the stone is meant to be a combination of different elements from the periodic table combined to make a stone that causes wonderous reactions on the human body (expanding lifespan) and metals (setting the electron shells of a metal and its protons and nuerons to immitate the Au shells and cores/ lamen's term = turn to gold).

I've never understood this myself. I think I read somewhere that JKR's American publishers, when "translating" her books so us yanks could understand the crazy language, suggested that they change "philosopher's" to "sorcerer's" because the legend of the philosopher's stone was not popular in the US and we wouldn't get the reference. Also, I heard that they thought readers would react more positively to a title with the word "sorcerer" in it rather than "philosopher" because you know how much we hate philosophers. lol

The term "philosopher's stone" is popular in America... anyone who watched the anime Fullmetal Alchemists are aware of the legend of the philosopher's stone. The anime renewed the legend in todays youth.